Hi guy, do redone have the self-service to check other parties who are using redone or other telco?

Just like DiGi can self-service to check other parties (by providing the mobile number) who are using digi or not. (If I'm not mistake, send to 20000 to check other parties who are the same telco or not.

I have try to key in between redone operator and redone operator (for my friend number)
And also between redone operator and celcom operator (for my friend number)

Both situations show "same operator" although calling from redone to celcom network (not redone same operator) have applied call charges.